Reenforced blade



Patented June 12,

UNETED snares warrant oration,

WILLIAM E. NICKJERSON, 0F CBLMBRIDGJE, MASSACHUSETTS, ASSIGNOR TU GILLETTE WEN RAZOR COMPANY, OF BOSTON, MASSACHUSETTS, A CURIPORA'JEIQN DELAWARE.

REJENFQECED Blhllllld.

- To all whom it may concern:

Be it lnno that l, Win Nrcson a citizen of the United States, residing at ilambridge, in the county of Middlesex t3 and State ofll/lassachusetts, have invented certain new and useful Improvements in Reenforced Blades, of which the following is a specification.

My invention relates to blades in which i to the cuttin portion is provided with a sheetnietal bacfiing or reintorcement, and is particularly applicable to single-edged blades for safety razors. In such blades, as commonly constructed heretofore, the cutting it portion has substantially the same width as the complete blade and the backing is folded around the rear edge of the cutting portion, which is firmly gripped and held by friction between the folds of the bachng. The 2t pcipal object of the present invention is to provide a blade of this general character in which a comparatively narrow strip of steel can be used as the cutting portion and securely held between the folds of. a rela as tively wide backing, which addsto the cutting portion the width required for the complete blade. In this way a saving in cost can be efiected, and a blade can'be produced which will be rigid as a whole although its an cutting portion is made from sheet steel of such thicmess as to be readily flexible.

lhe object above referred to is accomplished in the manner hereinafter-described in conneetionwith the accompanying draw- 35 ing, in which: a Figure l is; a plan view show ng one form of blade embodying my invention;

Figure 2 is a transverse section on the line .2--2"in Figure l; 7 on Figure 3 is a "plan view of a blade of sli htly modified construction; I

igure 4 is a transverse section on the line ll-4 in Figure 3;

Figure 5 is a plan view of the bla from 45 which the backing shownin F1gures 3 and d is made; and

Figures 6, 7 and 8 are plan views of blades embed 1'1. other modifications, the backing shown in Figure 8 being partly broken an away.

In the blade shown in Figures 1 and 2 the cutting portion 2 is made of sheet steel of any desired thieess and is provided with a.

cuttingedge 3, and the bacg 4' is made of arectangular vpiece of sheet metal folded upon itself and provided on one side with a nuinber oil tongues 5 struck up from the sheet metal, in line with one another, and on the other side with a corresponding nuanber of perforations 6. Each perforation 5 registers with the corresponding toe d on the other side of the bacla'ng when the latter is folded, and is of such size that the tongue-can be passed through it, the tongues being preferably formed with semi-circular free ends and the perforations being correspondingly shaped, as shown The parts are assembled by folding the backing and bending over "the tongues nearly to their final position, then inserting the rear edge of the cutting portion 2 between the folds of the backing until it bringsup against the tongues, and then turning down the ton es tightly on t perforated fold of the back- 1 ing as shown in Figure 2, whereby the cutting portion is firmly gripped between the folds. 'lhe tongues are so located within)?- erence to the width of the cutting portion 2 a that the completed blade has the desired width and the cutting edge 3 projects beyond the edges of the backing to the desired extent, and in addition to tying the parts together and serving as stops to position the cutting portion during the assembling of the parts the tongues also render it impossible for the cutting portion to slip backward within the backing when the blade is in use. i I The blade shown in Figures 3 and; 4c is like the one just described except that each told of the backing 4t is provided with one or more tongues 5' and one or more perforations 6' arranged in alternation and each perforation is circular instead of semi-circular in form, so'that when each tongue is bent around the rear edge of the cutting portion 2 its free end is received within the corresponding perforation as shown in Figure 4:. I prefer this form of blade to that shown in Figures 1 and 2 because the free ends of the tongues are flush with the backing instead of over-lying it. The alternation of the tongues and perforations in the folds isnot essential, but since the cutting portion is gripped between the free end of each tongue and the fold from which the tongue is formed it is desirable'to alternate the tongues and perforations in order to 1 cause alternate tongues to engage opposite sldes of the cutting portion and thereby tie the latter securely to both folds.

The modification shown in Figure 6 is particularly. intended for blades which are to be used in holders having stops at the ends of the guard for engagin and posi tioning the cutting edge of the b ade and in which the cutting portion of the blade isin order to prevent the cutting ortion from bending when pressed against the stops.

Otherwise theconst-ruction is as shown in;

Figures 3 and 4. Instead of securing the cutting portio and the backing together by means of tongues passing around the rear edge of the cutting'portion, this may be done in the manner illustrated in Figure 7 which shows a blade wherein the backing 4* is provided at each end of one fold with a tongue8 and .the cutting portion 2 is held in place by bending these tongues around its endsand overlapping them upon the opposite fold of the backing. In this case a stop for ppsitioning the cutting portion is preferably rovided by means of additional tongues 9 ibrmed'from one of the folds, of the backing and passing through perforations 10 in the, other fold far enough to cross the rear edge of the cutting portion.

In the blade shown in Figure 8 the tongues-9 above described are rendered unnecessary by forming notches 11 in the ends of the cuttlng portion 2 and locating the tongues 8- in the notches- 11 when folded over, these tongues being provided at the ends of the backing 4 as in the construction shown in Figure 7 It will be seen that in each form of blade above described the greater part of the width of the blade is provided by the backing and that although the cutting portion is located at a distance from the rear edge of the backing the folds of the latter cannot spring apart sufiicient-ly to release the cutting portion because of the fact that the parts aretied together at points close to.

the cutting portion, so that a 'securefrictional grip on the latter is provided. My invention resides primarily in these general features and is applicable to a wide varie of lad luding blades. inwhic'h the in the other fold.

. rename cutting portion is forged insteadof being stamped out of sheet steel.

I claim L 1. A reenforce'd blade comprisinga folded backing and a cutting portion located in part between the folds of the backing and terminating at a distance from its folded edge, said backing being provided with I tongues bent around the cutting portion at points close to the latterwhereb said cutting portion and both of the .over ying folds are secured together. i

2. A reenforced blade 'comprisingafolded backing and a flexible cutting portion located in part between thefolds of the backing. each fold-being provided at each end with a projection extending beyond its in- 'termediate portion toward the exposed edge of the cutting portion and terminating closely adjacent to the latter, and means for clamping said cutting portion between the overlying-folds of the backing in fixed relation thereto. I 3. A reenforced blade comprising a folded backing and,a-c;utti1ig portion located in partbetween the-folds of'thebacking and terminating at a distance from its {folded edge, said backing. bein provided with tongues bent around the lnner ed e of the cutting portion whereby the atter is gripped between the folds.

fl. A reenforced blade comprisinga folded v backing, a cutting portion ocated in, part between the folds of the bac ing and teml r nating at a distance fromfits. folc d edge, and 'a plurality of tongues formed i'in part from one fold and in part' from other fold of the backing and each entig round the inner edge of the cutting portioii, whereby the latter is gripped between said folds. 5. A reenforced blade comprisinga folded backing and a cutting portion located in partbetween the folds of the backin and terminatingat a distance from its olded edge. each fold being provided with one or more tongues bent around the inner edge of the cutting portion and turned down upon the'lat ter within aperforation formed folded edge. each fold being provided at each end with a projection extendingto:

ward and' terminating closely adjacent to the exposed edge of the cutting portion, and

a plurality of tongues formed from the backing and bent around the inner edge of the cutting portion whereby the latter is gripped between said folds.

7. A reenforced blade comprising a folded backing, a flexible cutting portion located ty in part between the folds" of the backing and terminating at a distance from its memes folded edge, each fold being provided at, inner edge of the cutting portion and turned each end with a projection extending todown upon the latter within a perforation ward and terminating closely adjacent to formed in the overlying fold. 10 the exposed edge of the cutting portion, and. Signed at Boston, Mass, this 8th day of 5 a plurality of tongues formed in partfrom January, 1919.

one fold and in part from the other fold of the backing and each bent around the WILLIAM E. NICKERSON. 

